21423402022 has 8 divisors (see below), whose sum is σ = 35056476072. Its totient is φ = 9737910000.

The previous prime is 21423402017. The next prime is 21423402059. The reversal of 21423402022 is 22020432412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 973791001 = 21423402022 / (2 + 1 + 4 + 2 + 3 + 4 + 0 + 2 + 0 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 21423401984 and 21423402002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486895479 + ... + 486895522.

It is an arithmetic number, because the mean of its divisors is an integer number (4382059509).

Almost surely, 2^21423402022 is an apocalyptic number.

21423402022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21423402022 is a deficient number, since it is larger than the sum of its proper divisors (13633074050).

21423402022 is a wasteful number, since it uses less digits than its factorization.

21423402022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973791014.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21423402022 its reverse (22020432412), we get a palindrome (43443834434).

The spelling of 21423402022 in words is "twenty-one billion, four hundred twenty-three million, four hundred two thousand, twenty-two".